A classic 1–1.5 hour crater hike with panoramic views of Waikiki and the Pacific; best done in the morning when it's cooler. Park open roughly 6:00am–6:00pm.
Protected marine life sanctuary with easy snorkeling; note the visitor center hours (usually 6:30am–4:00pm) and limited daily entry—reserve if possible.
Half-day boat trip across the lagoon to snorkel, feed rays and see blacktip reef sharks—great for snorkeling novices and photographers; tours typically run 9:00am–3:00pm.
Ferry to Waiheke (about 40 min) then vineyard visits and optional e-bike to explore beaches and scenic viewpoints; ferries run early to late afternoon.
Either hike up or ride the cableway for sweeping city, mountain and ocean views; cableway typically runs 8:00am–7:00pm depending on season and weather.